Mine were IVF and I started feeling really sick at technically 3 weeks. Or only about 1 week after embryo transfer. One week later I walked into the clinic and told the nurse that I just knew not only was I finally pregnant this time but I was positive it was twins. Blood test results showed high HCG but they said it could be a single baby or twins.
Then I had bleeding just before 7 weeks. Early scan to check at 7 weeks and I was told I could be loosing the baby. But all was fine x2!!